Holographic recording medium

Abstract

A holographic recording medium includes a recording layer containing a matrix material, a photoactive monomer having an ethylenic unsaturated bond dispersed in the matrix material and a photoinitiator, and a polymerization-terminating layer formed on at least one surface of the recording layer.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

FIG. 1 is a cross-sectional view of a holographic recording medium according to an embodiment;

FIG. 2 is a cross-sectional view of a holographic recording medium according to an embodiment;

FIG. 3 is a schematic diagram of a holographic recording/reconstructing apparatus according to an embodiment;

FIG. 4 is a schematic diagram of a holographic recording/reconstructing apparatus according to an embodiment; and

FIG. 5 is a schematic diagram of a holographic recording/reconstructing apparatus according to an embodiment.

Claims

1. A holographic recording medium, comprising: a recording layer containing a matrix material, a photoactive monomer having at least one ethylenic unsaturated bond and a photoinitiator both dispersed in the matrix material; anda polymerization-terminating layer formed on at least one surface of the recording layer.

2. The medium according to claim 1, wherein the polymerization-terminating layer is formed on a recording beam incidence surface of the recording layer.

3. The medium according to claim 1, wherein the polymerization-terminating layer is formed on the opposite surface of a recording beam incidence surface of the recording layer.

4. The medium according to claim 1, wherein the polymerization-terminating layers are formed on both surfaces of the recording layer.

5. The medium according to claim 1, wherein the polymerization-terminating layer comprises an inhibitor.

6. The medium according to claim 1, wherein the matrix material is a cross-linked polymer matrix formed of a cured resin of an epoxy compound and a curing agent.

7. The medium according to claim 1, wherein the monomer is contained in the recording layer in a range of 1 to 50 wt %.

8. The medium according to claim 1, wherein the photoinitiator is contained in the recording layer in a range of 0.1 to 20 wt %.

9. A holographic recording medium, comprising: a first transparent substrate;a polymerization-terminating layer;a recording layer containing a matrix material, a photoactive monomer having an ethylenic unsaturated bond, and a photoinitiator both dispersed in the matrix material; anda second transparent substrate.

10. The medium according to claim 9, further comprising a polymerization-terminating layer between the recording layer and the second transparent substrate.

11. The medium according to claim 9, wherein the polymerization-terminating layer comprises an inhibitor.

12. The medium according to claim 9, wherein the matrix material is a cross-linked polymer matrix formed of a cured resin of an epoxy compound and a curing agent.

13. The medium according to claim 9, wherein the monomer is contained in the recording layer in a range of 1 to 50 wt %.

14. The medium according to claim 9, wherein the photoinitiator is contained in the recording layer in a range of 0.1 to 20 wt %.

15. A holographic recording medium comprising: a transparent substrate;a recording layer containing a matrix material, a photoactive monomer having an ethylenic unsaturated bond, and a photoinitiator both dispersed in the matrix material;a polymerization-terminating layer;a gap layer;a reflective layer; andanother substrate.

16. The medium according to claim 15, further comprising a polymerization-terminating layer between the transparent substrate and the recording layer.

17. The medium according to claim 15, wherein the polymerization-terminating layer comprises an inhibitor

18. The medium according to claim 15, wherein the matrix material is a cross-linked polymer matrix formed of a cured resin of an epoxy compound and a curing agent.

19. The medium according to claim 15, wherein the monomer is contained in the recording layer in a range of 1 to 50 wt %.

20. The medium according to claim 15, wherein the photoinitiator is contained in the recording layer in a range of 0.1 to 20 wt %.